Ellen DeGeneres and Portia de Rossi work out marital issues

ELLEN DeGeneres and Portia de Rossi are reportedly trying to work through their marital issues.

The couple's relationship allegedly hit the rocks recently after an argument reportedly led to Portia seeking treatment in rehab for drug and alcohol problems, but the duo are keen to repair their romance and move on.

A source told PEOPLE.com: "They've had their ups and downs. Portia has been very outspoken about previous issues, like her eating disorder, and she's good at seeking help when she needs to.

"They've worked out difficulties in the past, and no doubt they're trying to work out any problems right now."

The couple enjoy renovating properties together and it is believed their argument stemmed from Portia feeling like she had taken on one of the projects alone.

The source explained: "At times Portia felt overwhelmed at all that goes into redoing a house and moving to another, no matter how lucrative it may be.

"She felt like she was doing everything herself and needed some downtime."

Meanwhile, friends of the pair believe they will have patched up their differences by next month and will celebrate six years of marriage by renewing their vows.

The source said: "They both love to celebrate special occasions and holidays, and their wedding anniversary is no different. They usually celebrate with a big party and invite a lot of friends. They really are a lovely couple. They enjoy being married, and it shows."